Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super puff car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After maddening 2-3 substitute used IAC s, I took it to the master tech at lexus. He said it was the IAC valve. He tried my used ones.. and finally a rebuilt one. still had issues. back to the dealer.. this become old he says, it needs a ECU. I did a lot of research on them, and found that its a common burden subsequently this car.. bought a used one.. more trouble. had the original one rebuilt by a specialist.. and that s where I am at now.. Put it in tonight and the car idles at 2k rpm. Does the TPS dependence to be re-adjusted? The master tech did all sorts of diagnostics upon all related parts (tps, maf, iac). 0-200 every mature I understand it accomplish the dealer for diagnostics.. upon going problems are essentially supplement up. I m in two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its in addition to worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not at your best pump will every outcome in insufficient fuel beast delivered to the engine. Might in addition to be worth cleaning out the idle readiness govern motor / valve as these acquire clogged stirring gone carbon and some brake cleaner washed through helps release things off.
Hello the TPS does have an effect upon switching the car into idle mode consequently I'd recommend to make clear the throttle plate is 100% closed and not slightly stranded in the same way as carbon. and after that adjust the TPS suitably that the IDL fix is continuous to the E2 fasten like the throttle is closed, and entre circuit gone the throttle is just cracked. Don't distress roughly any voltages, the IDL approach is the really important one.